Fire Apparatus USA 27
Fire Apparatus USA 27 : Design and Construction (2) Visual Warnings: Visual warnings on a fire appliance can be of two types: either passive or active. (1) Passive Visual Warnings: The passive visual warnings involve the use of high contrast patterns. Older vehicles (and those in developing countries) are more likely to have their patterns painted on, whereas modern appliances often carry retro-reflective designs which reflect light from headlights or torches. Patterns include "checker board" (alternate coloured squares, sometimes called "battenburg markings", named after a type of cake), chevrons (arrowheads, often pointed towards the front of the vehicle if on the side, or pointing vertically upwards if on the rear) or stripes (along the side; these were the first type of retro-reflective devices introduced, as the original retro-reflective material came only in tape form). In some countries, in addition to retro-reflective markings, vehicles are now painted a bright yellow or orange, although in many other countries, red remains the colour for fire engines. In Australia a number of rural fire units are painted white, such as those used by the Country Fire Service in South Australia, making them more visible in bushfire conditions. Another passive marking is the word FIRE, RESCUE or local language variant spelled out in reverse on the front of the vehicle. This enables drivers of other vehicles to more easily identify a fire service vehicle in their rear view mirrors. The appliance may also display a telephone number which may be used to summon assistance, along with the name of the operating department or station identifier. NFPA 1901 Standards for Automotive Fire Apparatus: 20. 4 Aerial Ladder Operating Position 20. 4. 2 A system that is lighted and marked with labels shall be visible from the operator's position to indicate the elevation, extension, and rated capacities (see sample ofboom angle indicator )
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